A tip for the Calibre Kindle Collections + Collections Manager users: when the device is connected, click on Customize, and check the box beside "only generate data for created/updated collections." Doing so becomes a huge time saver once you eject and start CM and then Import from Calibre.

You can check your kindle firmware version. I think the newest one broke the collections manager. Have you had the wifi on since the last time CM worked?

Personally I have the "back door lock" hack so that I don't have to deal with annoying updates that mess up my hacks.

Also, you say in another post that you don't use Calibre Kindle Collections? This particular thread is about using the Kindle Collections Plugin in Calibre. If you want info on using Collections Manager, go to the Kindle Developer's corner threads.

The slowness of using CM is due to the processor and eink functionality on the paperwhite, not to limitations of CM. Using Collection Manager with the Calibre Kindle Collections plugin has speeded everything up for me a LOT.

Yes to delete CM just remove the document. Your collections will still be there.

Interesting. Yes, I usually leave the WiFi on so that I can consult Wiki and other online sources. I do use Calibre, I just don't use it with collections. I've tried to sync the collections including importing the collections I have (had) on Kindle into Calibre, and the other way around basing them on the three deep Genre column I created in Calibre, but it doesn't work. I get a whole bunch of additional "collections" that are just book titles and no recognition of the collections already on the Kindle. I sort of gave up trying to get Calibre and Kindle to see eye to eye.

Interesting. Yes, I usually leave the WiFi on so that I can consult Wiki and other online sources. I do use Calibre, I just don't use it with collections. I've tried to sync the collections including importing the collections I have (had) on Kindle into Calibre, and the other way around basing them on the three deep Genre column I created in Calibre, but it doesn't work. I get a whole bunch of additional "collections" that are just book titles and no recognition of the collections already on the Kindle. I sort of gave up trying to get Calibre and Kindle to see eye to eye.

Then yes, your Kindle could have updated. You can check it in the settings menu, and look in the "collections manager" thread in the Kindle forum to see if that is why CM isn't working for you now.

If Collection Manager still works -

The three deep genre column in Calibre is not going to work the way you were hoping, for making collections on the Kindle, I don't think.

In Calibre look at the Kindle Collections, Customize Kindle Collections, and see what you have for "actions." You can select the Genre column to create collections from. Then click ok, and click Kindle Collections, Create. When it's done, eject. Wait for the Kindle to finish processing, then start Collection Manager on the Kindle. then go to settings and select "Import collections from Calibre."

Another thing, I am not sure if you can use CM to import kindle-only collections to calibre. The feature in CM that says "Export to Calibre" has more to do with exporting changes you have made on the device, so that the Kindle Collections plugin doesn't change something you don't want changed.

Doesn't work on Kindle 3 with 3.4 firmware. Tried to upgrade from 0.6 jailbreak and 0.3 usb net. Something went wrong. Device freezed on usb insert. Done Restore to Factory defaults. Instaled new version along some other things (lounchpad, freedownload, mplayer, K3Chess, KPV). Plugin seems to work correctly but when I disconnect Kindle there is nothing changed.

Do you have the Kindle Collections Plugin installed in Calibre? It's the first post of this thread.

You've got me here . Yes, I do have the latest plugin installed - and not working, this is why I am in this thread.
But I thought "import collection from Kindle" from plugin menu is enough to settle this in the first place....

Ok, just checking...and may I also assume your paperwhite is jailbroken, and that the Collection Manager is installed and working?

I am not at my computer, but I can tell you from memory what I do.

If I have made any changes on the device that I want to make sure are saved, first I start CM on the device, and select Import Collections TO Calibre.

When that is done, I attach the device to the PC with Calibre running. If I am adding anything or have updated anything in my custom column, I then select Create Collections from the calibre kindle collection menu. When that is done, I eject, wait for the Kindle to catch up, start up Collection Manager on the device, then select Import Collections FROM Calibre. When that is done, I exit out of CM, and my collections are correct.

After that, booklover6 pretty much perfectly summarized the workflow (whether you use a custom column or not is irrelevant to the PW-specific situation, I personally don't, and build collections from specific tag prefixes). Note, that, if, like me, you only work on collections in Calibre, it gets a bit easier/faster, as there are settings dedicated to this specific workflow in the PW friendly tweaked version of this plugin.